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(51-04) Compilation of the embodied energy and emission intensity database for Japan using Input-Output tables. Nansai, Keisuke*,1, Moriguchi, Yuichi1, Tohno, Susumu2, 1 National Institute for Environmental Studies, Tsukuba, Japan2 Kyoto University, Uji, Japan ABSTRACT- At present, many enterprises and institutions are interested in Life Cycle Assessment (LCA). Many case studies on LCA analyzing CO2 emissions or energy consumption have been reported to date. An intensity calculated by the Input-Output approach shows direct and indirect emissions along with a sector's unit production activity. It can therefore be used as life cycle inventory data in LCA. A few research institutions in Japan have reported the data on CO2 emission and energy intensity. However there are few intensity data on other environmental burden because of difficulty in estimating the realistic emission. For example, the estimation of air pollutants emission needs to be considered the reduction efficiency for removal technologies that are different between industries. We compiled an inventory of emission intensities of NOx, SOx and suspended particulate matter (SPM) responsible for regional environmental issues outside of energy consumption and CO2 emissions using the Input-Output tables in 1990 and 1995. Consumptions of 21 fossil fuels and 5 other fuels were estimated according to approximately 400 sectors. Air pollutants emission factors for stationary sources were calculated from the results of a survey on the air pollution prevention in Japan. Pollutants emissions from mobile sources are estimated taking into consideration car types, traveling speed and distance. We also counted the emissions from 7 specific sources to each environmental load. As a result, it was concluded that the total energy consumption was 18.3 EJ and the respective total emissions of CO2, NOx, SOx and SPM were 1.3 Gt-CO2, 3.5 Mt, 1.9 Mt and 0.3 Mt in 1995. Key words: Input-Output tables, Database, Intensity, Air pollutants |
